Combined type-writing and computing machine.



c. A. JoEmssEN.

WHTING AND COMPUTING MACHINE.

` coMBmf TYPE vAPPLICATION FILED OCT. 28. 19H

Patented' Nov. 20,1917.

INVENTOB:

UNITED STATES PATENT OFFICE.

CARI. A. JOEIBISSEN, Ol' WASHINGTON, DISTRICT O1' COLUMBIA, ASSIGNOB TO UNDER- WOOD COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

Specification of Letters Patent. i

Patented Nov. 2o, 1917.

Application led October 28, 1911.l Serial No. 657,286.

To all whom t may concern.'

Be it known thatl I, CARL A. JonRIssEN, a citizen of the United' States, residing in city of Washington, District of Columbia, have invented certain new and useful Improvements in Combined Type-Writin and Computing Machines, of which the ollowing is a specification.

This invention relates to computing machinesfand particularly to combined typewriting and computing machines of the type shown in the patent to Hanson No. 905,421, granted December 1 1908. y

In a machine of this class, it is necessary, after adding a column'of figures, to manipui late the type keys to write in the total which appears upon the computing wheels at the slght opening. In cop ing this total, the operator is liable to ma e an error; and it is one of the main objects of my invention to provide means for guarding against the consequences of such an error.

I provide a platen, around which is wrapped a tally strip or sheet; said platen and sheet being normally withdrawn from the computing wheels; but by depressing a handle the platen andsheet may be carried into engagement with the computing wheels, to make an impression of the total upon the tally sheet. This operation is performed every time that a total is copied by manipulating the keys; and upon subsequently comparing the typewritten totals with those which appear upon the tally sheet, it can be ascertained whether the typewritten totals upon the work sheet are correct.

Other objects and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a diagrammatic side elevation of my improvements in one form applied to an Underwood Hanson typewritin machine, such as illustrated in pending applications of F. A. Hart.

Fig. 2 .is a front elevation of a portion of the devices seen at Fig. 1.l

Fig. 3 shows the Fig. 1 parts in working positions.

Fig. 4 is a sectional front elevation of a plurality of computing heads provided with the present improvements.

Flg. 5 is a perspective of the devices applied to a single adding head.

The dial wheels 10 are placed side by side t0 form a. computing head; each dial wheel having letters 11 in relief to form types, l

from which impressions can be made; said types being made in regular readable form, as seen at Figs.` 2 and '5. The wheels are placed upon a horizontal arbor 121extending across themachine Yas usual; and they' are rotated in the manner disclosed in said Hanson patent or adopted in said Underwood-Hanson machine. I

The total printing device` comprises a cylindrical soft rubber platen 13 normally disposed out of the way in front ofthe readingl line on the computing wheels or infront of the sight openin 14 in the top 15 of the casing; the sides o? the casing being indicated at 16, Fig. 4.

By depressing a handle 17, the platen 13 is drawn backwardly and pressed down upon the reading line of types, which are indicated at 11". The handle 17 for this purpose is fixed upon a rock shaft 18, from the ends of which extend upwardly a pair of arms 19, which are pivot'ed at their upper ends at 20 to a pair of links 21, through which extends the platen axle 22. The ends of the platen axle are prolonged beyond the links into two opposite guide slots formed in the' upper ends of standards 24, which form a part of the framework of the adding head. As the arms 19 swing rearwardly the projecting ends 22 of the platen axle follow the guide slots 23, and the platen is guided downwardly and drawn forcibly against the reading line 11n of the types on the dial wheels. Around the platen is placed a tally strip or sheet 25 and a carbon sheet 26, in such a manner that a carbon impression is made upon .the inner side of the tally sheet, that is the side which is nearer to the surface of the platen; the impressions therefore reading the same way as the types read upon the dial wheels.

Upon releasing the handle 17, the frame 19, 18, 21, 22 isreturned by a spring 27; and a ratchet wheel 28 fixed on the platen axle 22 is intercepted by a spring-pressed pawl 29, which is provided at 30 upon one of the standards 24, whereby the platen is caused to revolve, or line-spacing thereof is p for the operator to depress the handle 17,

whereupon the total will be recorded upon the tall sheet, before being written upon the wor sheet by manipulation of the usual type keys, not shown.

At Fig. 4, it will be seen that there are two of the platens 13and 13, both mounted upon the axle 22 and carried by the links 21; a single pawl 29 and ratchet Wheel 28,

serving to line-space both platens.

It will be understood that the type surfaces may be made sharp, and the platen suiiciently soft and the carbon sufficiently tacky to 'enable readable im ressions to be taken, so that a reliable chec upon the operators accuracy is preserved.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

The combination with the dial wheels of a totalizer having visible types thereon which may be directly read in the natural form and order, of a platen mounted to be normally Withdrawn from said dial Wheels to a position to leave the view of said dial wheels unobstructed, a platen-impressing device capable, by a single movement thereof, of both moving the platen to printing position and obtaining thereon an impression of the readin line from the dial wheels, and means to ho d a work-sheet upon said platen; said work-holding means being mounted to move with the platen to carry the sheet to the printing line and away therefrom to such a position that the sheet does not obstruct the view of the reading line on the wheels.

CARL A. JOERISSEN.

Witnesses:

' E. M. RULE,

L. E. ELWooD. 

